100+ Free ADC Written Exam (Dental Hygiene) Practice Questions

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When planning fissure sealant placement, which tooth and patient situation represents the strongest indication?

A frankly cavitated occlusal lesion into dentine

A fully restored molar with an existing amalgam

A primary incisor with no occlusal surface concerns

A deep, plaque-retentive pit and fissure on a newly erupted permanent molar in a caries-active child

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Sample ADC Written Exam (Dental Hygiene) Practice Questions

Try these sample questions to test your ADC Written Exam (Dental Hygiene) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A patient who recently migrated to Australia tells you, through limited English, that they do not understand the consent form for a course of periodontal debridement. According to the Dental Board of Australia's Code of Conduct, what is the dental hygienist's most appropriate action?

A.Arrange a qualified interpreter so informed consent can be obtained before proceeding

B.Ask a family member in the waiting room to quickly translate and sign on the patient's behalf

C.Proceed with treatment because periodontal debridement is low-risk and consent is implied by attendance

D.Postpone all care indefinitely until the patient learns enough English to read the form

Explanation: Valid informed consent requires the patient to understand the nature, risks and alternatives of care. Where a language barrier exists, the Code of Conduct expects practitioners to use a qualified interpreter so the patient can genuinely understand and freely agree before treatment begins.

2Under the Australian National Law, dental hygienists must hold professional indemnity insurance arrangements and complete continuing professional development to maintain registration with Ahpra. Which statement best reflects the CPD requirement for registered dental hygienists?

A.CPD is voluntary and only recommended for those in private practice

B.CPD is only required once every five years at renewal of an AHPRA audit

C.A minimum number of CPD hours, including clinical and scientific content relevant to scope, must be completed each registration period

D.Only dentists, not hygienists, are required to undertake CPD under the National Law

Explanation: The Dental Board of Australia requires all registered dental practitioners, including dental hygienists, to complete a minimum amount of CPD each registration period, with content relevant to their scope of practice. This supports safe, current, evidence-based care.

3A dental hygienist working in a rural Aboriginal Community Controlled Health Service is planning an oral health promotion program for school-aged children. Which approach is most consistent with culturally safe, evidence-based health promotion?

A.Deliver a standardised lecture used in metropolitan schools without local adaptation

B.Distribute printed pamphlets only, as written material is the most cost-effective channel

C.Focus solely on restorative treatment vouchers rather than prevention

D.Engage local Aboriginal Health Workers and community Elders to co-design culturally appropriate messages and a fluoride strategy

Explanation: Culturally safe health promotion requires partnership with the community. Co-designing messages with Aboriginal Health Workers and Elders increases relevance, trust and uptake, and aligns with the social determinants and self-determination principles central to Aboriginal and Torres Strait Islander health.

4A water fluoridation program in a regional Australian town adjusts the fluoride concentration of the reticulated supply. What is the optimal target concentration range for community water fluoridation recommended in Australia for caries prevention?

A.0.1 to 0.3 mg/L

B.0.6 to 1.1 mg/L

C.2.0 to 3.0 mg/L

D.4.0 to 5.0 mg/L

Explanation: Australian guidelines recommend community water fluoridation in the range of approximately 0.6 to 1.1 mg/L (parts per million), balancing maximal caries-preventive benefit against the risk of dental fluorosis. The exact target within this range is adjusted for climate and water consumption.

5During a recall appointment, a 14-year-old patient discloses to the dental hygienist that they are being physically harmed at home. In Victoria, what is the hygienist's primary professional and legal obligation?

A.Act on mandatory reporting obligations and report the reasonable belief of child abuse to the relevant child protection authority

B.Keep the information completely confidential as it is unrelated to oral health

C.Tell the parents in the waiting room immediately so they can address it

D.Wait until the next appointment to see whether the child raises it again

Explanation: Registered dental practitioners are mandatory reporters of suspected child abuse. When there is a reasonable belief a child is being abused, the hygienist must report to the appropriate child protection authority; this duty overrides ordinary confidentiality to protect the child.

6A dental hygienist wishes to administer local anaesthetic and place fissure sealants without a dentist's direct examination of every patient. Which factor most appropriately determines whether this is within the hygienist's scope of practice in Australia?

A.The hygienist's own confidence regardless of education and competence

B.Whether the practice owner verbally permits it on the day

C.Their education, training and competence, together with a structured professional relationship and the Dental Board's Scope of Practice registration standard

D.The number of years since graduation alone

Explanation: Scope of practice in Australia is defined by the practitioner's education, training and demonstrated competence, operating within a structured professional relationship as set out in the Dental Board's Scope of Practice registration standard. Tasks must fall within what the practitioner is educated and competent to perform.

7Which statement best describes the relationship between socioeconomic status and oral disease that should inform a hygienist's health promotion priorities in Australia?

A.Oral disease is distributed evenly across all socioeconomic groups

B.Higher socioeconomic groups have the greatest burden of untreated decay

C.Socioeconomic status has no influence on access to dental care

D.Lower socioeconomic status is associated with higher rates of untreated caries and periodontal disease, reflecting social determinants of health

Explanation: Australian oral health surveys consistently show a social gradient: people of lower socioeconomic status experience more untreated caries and periodontal disease, driven by social determinants such as income, education and access to care. Targeting these groups improves equity.

8A hygienist counsels a parent about an infant's bottle use. Which dietary advice most effectively prevents early childhood caries?

A.Allow the infant to sleep with a bottle of milk or juice to settle at night

B.Avoid putting the infant to bed with a bottle containing anything other than water and encourage drinking from a cup by around 12 months

C.Replace milk with cordial during the day to reduce night-time feeds

D.Add a small amount of honey to the bottle to reduce crying

Explanation: Prolonged exposure to fermentable sugars from bottles, especially overnight when salivary flow is low, drives early childhood caries. Advising against sleeping with sweetened bottles and transitioning to a cup around 12 months reduces this risk.

9A hygienist is asked to advertise their services on social media. Under Ahpra advertising guidelines, which of the following is prohibited?

A.Using testimonials that reference the clinical care or treatment outcomes provided

B.Stating the practitioner's registration division and qualifications

C.Listing the services offered and their fees

D.Providing accurate opening hours and contact details

Explanation: Under the National Law and Ahpra advertising guidelines, using testimonials about clinical care or treatment outcomes in advertising a regulated health service is prohibited because such claims can mislead consumers and cannot be verified.

10A community dietary survey shows high consumption of sugar-sweetened beverages among adolescents. Which population-level intervention is most aligned with upstream oral health promotion?

A.Providing free toothbrushes at the dental clinic only

B.Recommending each adolescent attend more frequent scale and cleans

C.Advocating for policy measures such as reducing sugary drink availability in schools and supporting healthy food environments

D.Increasing the strength of in-chair fluoride varnish

Explanation: Upstream, population-level health promotion targets the environment and policy that shape behaviour. Advocating to reduce sugary drink availability and create healthy food environments addresses a root cause of caries across the whole population, not just individuals.

About the ADC Written Exam (Dental Hygiene) Exam

The ADC Written Examination for Dental Hygiene tests the science and practice of dental hygiene and the clinical judgement needed to practise safely in Australia. It is a paper-based exam of two 90-minute papers (100 scenario-based MCQs total) held twice yearly, primarily in Melbourne, for overseas-qualified dental hygienists seeking registration.

Assessment

Two papers of 50 scenario-based single-best-answer MCQs each (100 total), sat over one examination day. The combined hygiene-and-therapy/oral health therapy paper instead contains 130 questions.

Time Limit

3 hours total — two 90-minute papers, both completed in one session

Passing Score

Modified Angoff standard setting; a pass is required in each of four assessment clusters. Cluster passing scores are not published — results are reported as grades A–D relative to the passing standard.

Exam Fee

AUD $1,432 (2026 ADC written examination application fee for dental hygiene/therapy) (Australian Dental Council (ADC))

ADC Written Exam (Dental Hygiene) Exam Content Outline

20%

Social Responsibility, Professionalism and Health Promotion

Ethics, the Dental Board Code of Conduct, scope of practice, informed consent, mandatory reporting, cultural safety, social determinants, water fluoridation and population oral health promotion.

30%

Clinical Information Gathering

Medical and dental history taking, drug interactions and bleeding risk, periodontal charting and indices, vital signs, radiographic technique and interpretation, and recognition of suspicious lesions.

30%

Diagnosis and Management Planning

2017 periodontal classification, staging and grading, caries risk assessment, minimal-intervention caries management, treatment sequencing, and risk-based referral and recall planning.

20%

Clinical Treatment and Evaluation

Scaling and root surface debridement, instrumentation and ultrasonics, local anaesthesia, fluoride and sealants, infection control and sterilisation, medical emergencies, and evaluation of treatment outcomes.

How to Pass the ADC Written Exam (Dental Hygiene) Exam

What You Need to Know

Passing score: Modified Angoff standard setting; a pass is required in each of four assessment clusters. Cluster passing scores are not published — results are reported as grades A–D relative to the passing standard.
Assessment: Two papers of 50 scenario-based single-best-answer MCQs each (100 total), sat over one examination day. The combined hygiene-and-therapy/oral health therapy paper instead contains 130 questions.
Time limit: 3 hours total — two 90-minute papers, both completed in one session
Exam fee: AUD $1,432 (2026 ADC written examination application fee for dental hygiene/therapy)

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

ADC Written Exam (Dental Hygiene) Study Tips from Top Performers

1Study to the four-cluster blueprint: weight your preparation roughly 20/30/30/20 across Professionalism and Health Promotion, Clinical Information Gathering, Diagnosis and Management Planning, and Clinical Treatment and Evaluation.

2Practise applied clinical reasoning rather than rote recall — every item is a scenario-based single-best-answer question set at the level of a minimally competent new graduate practising in Australia.

3Be confident with Australian-specific content: water fluoridation levels, the Dental Board Code of Conduct and scope of practice, the 2017 periodontal classification, and ARC-based medical emergency management.

Frequently Asked Questions

How many questions are on the ADC dental hygiene written examination?

The dental hygiene written examination has 100 scenario-based single-best-answer multiple-choice questions, split into two papers of 50 questions each. The combined dental hygiene and dental therapy (or oral health therapy) paper instead has 130 questions.

How long is the ADC dental hygiene written exam and how is it structured?

It is paper-based and runs for 3 hours in total — two papers of 90 minutes each, both completed in a single examination day. Each paper draws questions from across all disciplines.

What is the passing standard for the ADC hygiene written examination?

Passing scores are set using the Modified Angoff method and candidates must pass each of four assessment clusters. The ADC does not publish numerical cluster passing scores; results are reported as grades A to D relative to the passing standard.

How much does the 2026 ADC dental hygiene written examination cost and how long is a pass valid?

The 2026 application fee is AUD $1,432. A pass in the written examination is valid for three years, within which the candidate must pass the practical examination.